Keystones — Cornerstone
Five GCSE retrieval questions · 30 March 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄11 + 3⁄11
Answer: 9⁄11 -
2. Algebra Two-step equations
Solve: 7x - 13 = 78
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Share 21 in the ratio 1:2
Answer: 7 and 14 -
5. Statistics Mean
Calculate the mean of: 44, 9, 49, 41, 13, 12, 11, 30. Give your answer to 2 decimal places
Answer: 26.13